KR101381825B1 - Reducing-agent supplying controller for denitrifing exhaust gas and the exhaust gas denitrifing system - Google Patents

Abstract

The present invention relates to an exhaust denitrifing reducing-agent supplying controller and an exhaust gas denitrifing system using the same, more specifically, to an exhaust denitrifing reducing-agent supplying controller and an exhaust gas denitrifing system using the same, which include a function performing unit including multiple execution modules for identifying the necessary amount of reducing-agent for exhaust according to the installation position and number of analyzers which measure and output information about the exhaust nitrogenous compounds as well as an error correcting unit for operating other execution modules according to the status of the analyzers when a selected execution module does not work due to malfunction of all or part of the analyzers. The exhaust denitrifing reducing-agent supplying controller and the exhaust gas denitrifing system using the same according to the present invention are easy-to-use and very economical as it is possible to supply the reducing-agent with appropriate execution modules regarding the installation position and number of the analyzers. Also, The exhaust denitrifing reducing-agent supplying controller and the exhaust gas denitrifing system using the same according to the present invention is capable of preventing nitrogenous compounds from being discharged and polluting the environment as the controlling method of reducing-agent supply can automatically change with all or part of the analyzers dysfunctional in order to timely supply the reducing-agent based on the situation. [Reference numerals] (71) Transceiving unit; (72) Function setting unit; (731) First storage module; (732) Second storage module; (74) Function performing unit; (751) Error deciding module; (752) Error correcting module; (761) Screen display unit; (762) Interface module; (77) Control unit

Description

Reducing-agent supplying controller for denitrifing exhaust gas and the exhaust gas denitrifing system}

The present invention relates to a reducing agent supply control device for exhaust gas denitrification and an exhaust gas denitrification system using the same, and more particularly, to exhaust gas according to the installation position and the number of analyzers for measuring and outputting information on nitrogen oxides of the exhaust gas. The function execution unit including a plurality of execution modules for calculating the amount of reducing agent to be supplied and the function execution unit according to the state of the analyzer when the selected execution module does not operate because an error occurs in all or part of the analyzer. Including error correction to operate the execution module, it is possible to supply a reducing agent by selecting the appropriate execution module according to the installation position and the number of the analyzer, it is possible to facilitate the use and economical efficiency, part or all of the analyzer at the time of installation If a breakdown occurs and does not work, the reducing agent is appropriate for the current situation. Since the supply control method is automatically changed to supply the reducing agent, the present invention relates to a reducing agent supply control device for exhaust gas denitrification and an exhaust gas denitrification system using the same, which can effectively prevent nitrogen oxides from being discharged into the environment.

Exhaust gas emitted from engines such as thermal power plants and ships using fossil fuel as an energy source contains a large amount of nitrogen oxides (NOx), which is known as a cause of acid rain and respiratory diseases. Therefore, an exhaust gas denitrification system for removing nitrogen oxides contained in the exhaust gas has been developed.

In the conventional exhaust gas denitrification system, an analyzer for measuring the amount of nitrogen oxide contained in the exhaust gas is installed at the inlet and / or outlet of the exhaust gas, and the controller receives the information transmitted by the analyzer and receives the nitrogen oxide. The amount of reducing agent fed to denitrify was adjusted.

However, the controller of the conventional exhaust gas denitrification system is set to control the reducing agent amount according to the position and number of the analyzer at the time of installation of the exhaust gas denitrification system, so that the position and the number of the analyzer are different from the exhaust gas denitrification system. In order to change the controller, there is a problem.

In addition, the conventional exhaust gas denitrification system has a problem that can not supply a reducing agent as it is damaged when the analyzer is damaged during use does not perform a function to discharge the nitrogen oxides as it is.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems,

The present invention provides a reduction agent supply control device for exhaust gas denitrification and exhaust gas denitrification system using the same that can select various types of reducing agent supply control method according to the analyzer installation position and the number, to facilitate convenience and economics. Its purpose is to.

In addition, the present invention, if some or all the failure of the analyzer at the time of installation does not operate, the reducing agent supply control method is automatically changed according to the current situation, the reducing agent is supplied to effectively prevent the nitrogen oxides are discharged to environmental pollution It is an object of the present invention to provide a reducing agent supply control device for exhaust gas denitrification and an exhaust gas denitrification system using the same.

In addition, the present invention calculates the amount of reducing agent in consideration of the amount of nitrogen monoxide and nitrogen dioxide, so that it can supply an appropriate amount of reducing agent, the exhaust gas denitrification effect can be improved and economical reducing agent supply control device for using the same The purpose is to provide an exhaust gas denitrification system.

Reducing agent supply control device for exhaust gas denitrification and exhaust gas denitrification system using the same for achieving the above object of the present invention includes the following configuration.

According to one embodiment of the present invention, the reducing agent supply control apparatus for exhaust gas denitrification according to the present invention is a reducing agent to be supplied to the exhaust gas according to the installation position and the number of analyzers for measuring and outputting information on the nitrogen oxides of the exhaust gas Including a function execution unit comprising a plurality of execution modules for calculating the amount of, by selecting the appropriate execution module according to the installation position and the number of the analyzer can be supplied with a reducing agent, it is possible to improve the convenience in use do.

According to another embodiment of the present invention, the reducing agent supply control apparatus for exhaust gas denitrification according to the present invention is the function according to the state of the analyzer when the selected execution module does not operate because an error occurs in all or part of the analyzer. Characterized in that it further comprises an error correction for operating the other execution module of the execution unit.

According to another embodiment of the present invention, in the exhaust gas denitrification supply control device for denitrification according to the present invention, the function execution unit first analyzer and denitrification to measure and output information about the nitrogen oxides of the exhaust gas before the denitrification treatment A first execution module for calculating the amount of reducing agent to be supplied to the exhaust gas according to the information transmitted by the second analyzer which measures and outputs information on the nitrogen oxides of the treated exhaust gas, and nitrogen of the exhaust gas before denitrification And a second execution module that calculates the amount of reducing agent to be supplied to the exhaust gas using only the information transmitted by the first analyzer for measuring and outputting information on the oxide.

According to another embodiment of the present invention, in the exhaust gas denitrification reducing agent supply control apparatus according to the present invention, the function execution unit information transmitted by the second analyzer for measuring and outputting information on the nitrogen oxides of the denitrified exhaust gas A third execution module for calculating the amount of reducing agent to be supplied to the exhaust gas only with a bay; and a fourth execution module for calculating the amount of reducing agent to be supplied according to data on the amount of the reducing agent stored in the storage unit when the exhaust gas is introduced. It characterized in that it further comprises.

According to another embodiment of the present invention, in the exhaust gas denitrification supply control device according to the present invention, the first execution module is to be supplied according to the information on the nitrogen oxide of the exhaust gas transmitted from the first analyzer. A reducing agent calculation module for calculating the amount of reducing agent, a first reducing agent correction module for correcting the amount of reducing agent calculated in the reducing agent calculation module in consideration of the ratio of nitrogen monoxide and nitrogen dioxide of the exhaust gas transmitted from the first analyzer; And a second reducing agent correction module for correcting the amount of reducing agent calculated by the first reducing agent correction module when the amount of nitrogen oxides in the exhaust gas transmitted from the second analyzer exceeds the allowable emission value.

According to still another embodiment of the present invention, in the exhaust gas denitrification reducing agent supply control device according to the present invention, the storage unit is tabled with the data on the amount of the reducing agent to be supplied according to the information of the engine for discharging the exhaust gas And a second storage module to be stored.

According to another embodiment of the present invention, in the exhaust gas denitrification reducing agent supply control device according to the present invention, the error correction module is an error determination module for calculating the error of the analyzer by analyzing the information transmitted from the analyzer, and If the error determination module determines that there is an error in the analyzer, it characterized in that it comprises an error correction module for controlling the operation of another execution module instead of the execution module selected according to the state of the analyzer.

According to another embodiment of the present invention, the error correction module in the exhaust gas denitrification supply control apparatus according to the present invention is a state in which information about the nitrogen oxides of the exhaust gas is transmitted by the first analyzer and the second analyzer. If the error determination module determines that there is an error in the second analyzer, the operation of the first execution module is stopped and the second execution module is operated, and the error determination module determines that the first analyzer has an error. In one case, the operation of the first execution module is stopped and the third execution module is operated. If the error determination module determines that both the first and second analyzers have an error, the operation of the first execution module is stopped. Operate the fourth execution module.

According to another embodiment of the present invention, the exhaust gas denitrification system using the exhaust gas denitrification supply control device according to the present invention is a reducing agent supply unit for supplying a reducing agent to the incoming exhaust gas, and a reducing agent supplied from the reducing agent supply unit and A reactor for converting nitrogen oxides into a nitrogen gas in the mixed exhaust gas, and a reducing agent supply control device for controlling the reducing agent supply amount of the reducing agent supply unit, the reducing agent supply control device is the reducing agent according to claim 1 or 2. Characterized in that the supply control device.

The present invention can obtain the following effects by the above-described embodiment, the constitution described below, the combination, and the use relationship.

According to the present invention, it is possible to select various types of reducing agent supply control methods according to the location and number of analyzers installed, thereby achieving convenience and economical efficiency.

In addition, the present invention, if some or all the failure of the analyzer at the time of installation does not operate, the reducing agent supply control method is automatically changed according to the current situation, the reducing agent is supplied to effectively prevent the nitrogen oxides are discharged to environmental pollution It can be effective.

In addition, the present invention calculates the amount of reducing agent in consideration of the amount of nitrogen monoxide and nitrogen dioxide, so that the appropriate amount of reducing agent can be supplied, the exhaust gas denitrification effect can be improved and the present invention can be economical described above in the present embodiment and below. The following effects can be obtained by the composition, combination, and use relationship.

1 is a block diagram of an exhaust gas denitrification system using a reducing agent supply control apparatus for exhaust gas denitrification according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a detailed configuration of a reducing agent supply control apparatus for exhaust gas denitrification of FIG. 1.
3 is a block diagram illustrating a detailed configuration of a transceiver of FIG. 2.
4 is a block diagram for explaining a detailed configuration of the function setting unit of FIG.
5 is a block diagram for explaining a detailed configuration of the function execution unit of FIG.
6 is a block diagram illustrating a detailed configuration of the first execution module of FIG. 5.
7 is a screen of the display of FIG.
8 is a perspective view of the reactor of FIG.
9 is a partially cutaway perspective view of the reactor of FIG. 8;
FIG. 10 is a perspective view of an exhaust gas denitrification reactor cut by line AA in FIG. 9; FIG.
FIG. 11 is a cross-sectional view of the exhaust gas denitrification reactor taken along line BB of FIG. 10.
12 is a partially cutaway perspective view of a reactor according to another embodiment.
FIG. 13 is a perspective view of a reactor cut by line AA in FIG. 12. FIG.
14 is a cross-sectional view of the reactor taken along line BB of FIG. 12.

Hereinafter, a reducing agent supply control apparatus for exhaust gas denitrification according to the present invention and an exhaust gas denitrification system using the same will be described in detail with reference to the accompanying drawings. Unless defined otherwise, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs and, if conflict with the meaning of the terms used herein, It follows the definition used in the specification. Further, the detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a block diagram of an exhaust gas denitrification system using a reducing agent supply control apparatus for exhaust gas denitrification according to an embodiment of the present invention, and FIG. 2 illustrates a detailed configuration of the reducing agent supply control apparatus for exhaust gas denitrification of FIG. 1. 3 is a block diagram illustrating a detailed configuration of the transceiver of FIG. 2, FIG. 4 is a block diagram illustrating a detailed configuration of the function setting unit of FIG. 2, and FIG. 5 is a function diagram of FIG. 2. 6 is a block diagram illustrating a detailed configuration of the first execution module of FIG. 5, FIG. 7 is a screen of the display of FIG. 1, and FIG. 8 is a reactor of FIG. 1. 9 is a partial cutaway perspective view of the reactor of FIG. 8, FIG. 10 is a perspective view of the exhaust gas denitrification reactor cut by line AA of FIG. 9, and FIG. 11 is a exhaust gas denitrification cut by line BB of FIG. 10. Is a cross-sectional view of the reactor, and FIG. A partially cutaway perspective view of a reactor according to another embodiment, FIG. 13 is a perspective view of a reactor cut by line AA of FIG. 12, and FIG. 14 is a cross-sectional view of the reactor cut by line BB of FIG. 12.

1 to 7, an exhaust gas denitrification system using an exhaust gas denitrification supply control apparatus according to an embodiment of the present invention includes an inlet 1 through which exhaust gas is introduced and an inlet 1. Reducing agent supply unit (2) for supplying a reducing agent to the exhaust gas introduced by the mixing, the exhaust gas introduced by the inlet (1) and the mixing gas to produce a mixed gas mixed with the reducing agent supplied by the reducing agent supply unit (2) A chamber 4 and a reactor 4 for denitrifying nitrogen oxides (NOx) to harmless components and reducing noise in a mixed gas mixed with the exhaust gas and a reducing agent, and denitrifying and reducing noise in the reactor 4. An exhaust unit 5 through which the exhaust gas is discharged, an analyzer 11 and 51 connected to the inlet unit 1 and / or the exhaust unit 5 and measuring the amount of nitrogen oxide contained in the exhaust gas; D for displaying information of the exhaust gas denitrification system. And a play (6), and a reducing agent supply controller 7 for controlling the overall operation of the NO x removal system.

The inlet 1 is a configuration in which a gas or a fluid (hereinafter referred to as 'exhaust gas') containing nitrogen oxide discharged from a small and medium-sized cogeneration-generated LNG gas discharge unit, an engine for thermal power generation, a marine engine, or the like is introduced.

The reducing agent supply unit 2 is configured to provide a reducing agent to the injection nozzle 31, and is controlled by the reduction control unit 7. Although not shown, the reducing agent supply unit 2 includes a reducing agent storage tank, a flow control pump, and the like. The reducing agent may be, for example, urea water or the like. The flow control pump has one end connected to an output end of the reducing agent storage tank to supply a reducing agent to the injection nozzle 31 and to control the reducing agent supply control device 7. The amount of supply of the reducing agent can be controlled by adjusting the strength of the output under the following conditions.

The mixing chamber 3 is configured to mix the exhaust gas introduced through the inlet 1 and the reducing agent supplied through the reducing agent supply unit 2 to be injected through the injection nozzle 31 to generate a mixed gas. to be. For example, when urea water is used as the reducing agent, the urea water injected through the injection nozzle 31 is mixed with high temperature exhaust gas and supplied with heat through the exhaust gas so that the urea water is reacted with It is converted into ammonia, and a mixed gas of ammonia and exhaust gas is supplied to the reactor 4.

xH ₂ O + CO (NH ₂ ) ₂ → 2NH ₃ + CO ₂ + (x-1) H ₂ O

The reactor 4 is located inside the catalyst to denitrify the nitrogen oxides (NOx) to a harmless component in the mixed gas of the reducing agent and the exhaust gas. Exhaust gas denitrified in the reactor 4 is discharged to the outside through the discharge unit (5). The reactor 4 includes a configuration for reducing the noise generated by the exhaust gas, a detailed description thereof will be described later.

The analyzers 11 and 51 are installed at the inlet 1 and / or the outlet 5 to sense information on the amount of nitrogen oxide contained in the exhaust gas, and then to the reducing agent supply control device 7 below. In a configuration for transmitting, the first analyzer 11 and the second analyzer 51 is included.

The first analyzer 11 is connected to one side of the inlet 1 to sense information on the amount of nitrogen oxide contained in the exhaust gas flowing into the reducing agent supply control device 7 to be described later It is meant for. The information on the amount of nitrogen oxides transmitted from the first analyzer 11 to the reducing agent supply control device 7 also includes a ratio of the amount of nitrogen monoxide and the amount of nitrogen dioxide.

The second analyzer 51 senses the amount of nitrogen oxide present in the denitrified exhaust gas discharged through the discharge unit 5 and transmits it to the reducing agent supply control device 7. The first and second analyzers 11 and 51 are respectively installed at the inlet 1 and the outlet 5, but in the exhaust gas denitrification system, only the first analyzer 11 is installed at the inlet 1. It is also possible, and only the second analyzer 51 may be installed in the discharge part 5, and even when the first and second analyzers 11 and 51 are not installed, the control of the reducing agent supply control device may be performed. By the reducing agent supply unit 2 it is possible to supply a reducing agent, which will be described in detail below.

The display unit 6 is configured to display information of the exhaust gas denitrification system, and is controlled by the reducing agent supply control device 7.

The reducing agent supply control device 7 is configured to control the overall operation of the denitrification system, and controls the reducing agent supply unit 2 to adjust the amount of the reducing agent to be supplied to the exhaust gas. The reducing agent supply control device 7 includes a transceiver 71, a function setting unit 72, a storage unit 73, a function execution unit 74, an error correction unit 75, a screen display unit 76, a control unit ( 77) and the like.

The transceiver 71 is configured to receive information on the nitrogen oxides of the exhaust gas transmitted from the first and second analyzers 11 and 51 and transmit information on the amount of reducing agent supply to the reducing agent supply unit 2, Receives a first receiving module 711 for receiving information on the nitrogen oxides of the exhaust gas transmitted from the first analyzer 11 and information on the nitrogen oxides of the exhaust gas transmitted from the second analyzer 51. The second receiving module 712, and a transmitting module 713 for transmitting information on the reducing agent supply amount to the reducing agent supply unit (2).

The function setting unit 72 stores various information of the denitrification system and selects a specific function of the function execution unit 74 to be described later. The engine setting module 721, the analyzer registration module 722, and the function selection Module 723.

The engine setting module 721 is a module for setting information on an engine that discharges exhaust gas to be denitrated by the denitrification system, and the information set by the engine setting module 721 is stored in the storage unit 73. do. The information on the engine includes an amount of exhaust gas that the engine normally discharges, an amount of nitrogen oxide contained in the exhaust gas, and the like.

The analyzer registration module 722 is a module for setting information on the position and the number of analyzers 11 and 51 installed in the denitrification system. The information set in the analyzer registration module 722 is stored in the storage unit 73. Will be stored in.

The function selection module 723 is a module for selecting a specific function of the function execution unit 74 according to the installation position and the number of the analyzers 11 and 51, and in the function selection module 723, the function execution unit. It is possible to select any one of the first to fourth execution modules 741 to 742 of 74.

The storage unit 73 is configured to store the information of the reducing agent to be supplied according to the information set by the function setting unit 72 and the information on the engine, the first storage module 731, the second storage module ( 732).

The first storage module 731 is a module for storing information on the denitrification system set by the function setting unit 72. 742).

The second storage module 732 is a module in which data about the amount of reducing agent to be supplied is stored in a table according to the information on the engine set by the engine registration module.

The function execution unit 74 is configured to include a plurality of execution modules for controlling the reducing agent supply amount of the reducing agent supply unit 2 by calculating the amount of reducing agent to be supplied to the exhaust gas according to the installation position and the number of analyzers, The first execution module 741, the second execution module 742, the third execution module 743, and the fourth execution module 744 are included.

The first execution module 741 may be configured according to the amount of nitrogen oxide contained in the exhaust gas transmitted by the first analyzer 11 installed at the inlet 1 and the second analyzer 51 installed at the outlet 5. The reducing agent supply amount of the reducing agent supply unit 2 is controlled by calculating the amount of reducing agent to be supplied to the exhaust gas, and the reducing agent calculating module 7741, the first reducing agent correction module 7272, and the second reducing agent correction module 7741 ).

The reducing agent calculation module 7171 is a module for controlling the reducing agent supply amount of the reducing agent supply unit 2 by calculating the amount of the reducing agent to be supplied according to the amount of nitrogen oxides in the exhaust gas transmitted from the first analyzer 11.

The first reducing agent correction module 7422 is a module for correcting the amount of reducing agent calculated by the reducing agent calculation module 7741 in consideration of the ratio of nitrogen monoxide and nitrogen dioxide of the exhaust gas transmitted from the first analyzer 11. For example, in the case of nitrogen dioxide, approximately 1.3 times of reducing agent is supplied as compared to nitrogen monoxide.

The second reducing agent correction module 7741 is a module for correcting the amount of reducing agent calculated by the first reducing agent correction module according to the amount of nitrogen oxides of the exhaust gas transmitted from the second analyzer 51, in the denitrification system. When the exhaust gas is normally denitrified, the amount of nitrogen oxides in the exhaust gas transmitted from the second analyzer 51 has a value within the allowable discharge value, so that it is not necessary to correct the amount of reducing agent supplied, but is transmitted from the second analyzer 51. When the amount of nitrogen oxides in the exhaust gas exceeds a discharge allowable value, the second reducing agent correction module 7741 corrects the amount of the reducing agent calculated by the first reducing agent correction module 7262.

The second execution module 742 calculates the amount of the reducing agent to be supplied to the exhaust gas according to the amount of nitrogen oxide contained in the exhaust gas transmitted by the first analyzer 11 installed in the inlet 1 and the reducing agent. The reducing agent supply amount of the supply unit 2 is controlled to include a reducing agent calculation module 7701 and a reducing agent correction module 7742.

The reducing agent calculation module 7741 is a module for controlling the reducing agent supply amount of the reducing agent supply unit 2 by calculating the amount of the reducing agent to be supplied according to the amount of nitrogen oxides in the exhaust gas transmitted from the first analyzer 11.

The reducing agent correction module 7742 is a module for correcting the amount of reducing agent calculated by the reducing agent calculation module 7701 in consideration of the ratio of nitrogen monoxide and nitrogen dioxide of the exhaust gas transmitted from the first analyzer 11, for example. In the case of nitrogen dioxide, about 1.3 times as much reducing agent as nitrogen monoxide is supplied.

The third execution module 743 calculates the amount of reducing agent to be supplied to the exhaust gas according to the amount of nitrogen oxide contained in the exhaust gas transmitted by the second analyzer 51 installed in the discharge unit 5, and reduces the amount of the reducing agent. The reducing agent supply amount of the supply unit 2 is controlled, and the reducing agent supply unit 2 is calculated by calculating the amount of the reducing agent so that the amount of nitrogen oxides in the exhaust gas transmitted from the second analyzer 51 has a value less than the allowable discharge amount. To control.

The fourth execution module 744 is configured to control the reducing agent supply amount of the reducing agent supply unit 2 according to the amount of the reducing agent to be stored stored in the storage unit 73 when the engine is operating.

The error correction unit 75 executes the function according to the current situation of the analyzers 11 and 51 when the execution module selected by all or part of the analyzers 11 and 51 is not properly operated. The configuration for controlling the operation of the other execution module of the unit 74, and includes an error determination module 751, error correction module 752.

The error determining module 751 is a module for calculating an error by analyzing information transmitted from the analyzers 11 and 51, for example, when information is not transmitted from the analyzers 11 and 51 or is out of an acceptable range. Determined by

When the error determination module 752 determines that the analyzer 11 or 51 has an error, the error correction module 752 adjusts the function execution unit 74 according to the state of the analyzer 11 or 51. This configuration controls the operation. For example, when the first analyzer 11 and the second analyzer 51 are installed in the denitrification system, and the error determination module 751 determines that the second analyzer 51 has an error, the error correction module is provided. 752 stops the operation of the first execution module 741 and executes the second execution module 742. When the error determination module 751 determines that the first analyzer 11 has an error, The error correction module 752 stops the operation of the first execution module 741 and executes the third execution module 743, and the error determination module 751 causes both the first and second analyzers 11 and 51 to operate. If it is determined that there is an error, the error correction module 752 stops the operation of the first execution module 741 and executes the fourth execution module 744. In addition, the first analyzer 11 or the second analyzer 51 is installed in the denitrification system. The error determination module 751 indicates that the first analyzer 11 or the second analyzer 51 has an error. If it is determined, the error correction module 752 stops the operation of the second execution module 742 or the third execution module 743 and executes the fourth execution module 744.

The screen display unit 76 is configured to display setting and execution information of the exhaust gas denitrification system, and includes a screen display module 761 for displaying on the display 6 information for setting and executing a function for reducing agent supply. And an interface module 762 for selecting an item of a screen displayed on the display 4 through a user's touch or mouse keyboard input. Information about the function setting unit 72 and the function execution unit 73 is displayed on the display by the screen display unit 761, and corresponds to the information displayed on the display 6 by the interface unit 762. You can select an item. The control unit 77 controls the overall operation of the reducing agent supply control device (7).

Looking at the operation of the reductant supply control device 7 having the configuration as described above, first select the item 101 of the engine setting module displayed on the display 6 to set and register the information about the engine, and then to register the analyzer Select item 102 of the module to set and register information on the analyzer about the location and number of analyzers installed in the denitrification system, and select items 103 to 106 of the function selection module to analyze the analyzer installed in the denitrification system. Select one of the first to fourth execution modules 741 to 744 of the function execution unit 74 corresponding to the information about. For example, when the analyzers 11 and 51 are installed in both the inlet 1 and the outlet 5, the item 103 of the first execution module is selected, and the analyzer 11 is installed only in the inlet 1. Is selected, the item 104 of the second execution module, if the analyzer 51 is installed only in the discharge unit 5, select the item 105 of the third execution module, the inlet (1) and the discharge unit If all the analyzers are not installed in (5), item 106 of the fourth execution module is selected. When any one of the first to fourth execution modules 741 to 744 of the function execution unit 74 is selected, the selected execution module is operated to control the supply of the reducing agent in the reducing agent supply unit 2.

Hereinafter, with reference to FIGS. 1 and 8 to 11, the detailed configuration and function of the reactor used in the exhaust gas denitrification system according to an embodiment of the present invention will be described. The reactor 4 is configured to denitrify nitrogen oxides (NOx) to harmless components in a mixed gas of a reducing agent and exhaust gas and to reduce noise, and includes a housing 41, a thermal insulation sound absorbing portion 42, a resonance portion 43, Including the catalyst unit 44, the silencer 45, etc., it is possible to reduce the noise at the same time as the denitrification reaction is characterized in that the size of the entire denitrification system can be reduced.

The housing 41 is configured to form the outer shape of the reactor 4, the thermal insulation and absorption unit 42, the resonance unit 43, the catalyst unit 44 and the silencer 45 is located inside the reactor. do. An inlet passage 414 is formed on the front surface 411 of the housing 41 to introduce the mixed gas discharged from the mixing chamber 3, and the rear surface 412 of the housing 41 is denitrated and noise is generated. A discharge path 415 through which the reduced exhaust gas is discharged is formed, and a side surface 413 is formed between the front surface 411 and the rear surface 412 of the housing 41 which are positioned at a predetermined interval. The housing 41 has a certain shape, but preferably has a rectangular cylinder shape.

The thermal insulation sound absorbing portion 42 is formed on the inner surface, that is, the inner surface of the side surface 413 of the housing 41 to reduce noise in the exhaust gas introduced through the inflow passage 414 and inside the housing 41. The heat of the reactor is prevented from being discharged to the outside to keep the reactor 4 warm. The sound absorbing and sound absorbing part 42 includes a heat insulating sound absorbing material 421, a support part 422, and the like.

The insulating sound absorbing material 421 is formed to surround the inner surface of the housing 41, to reduce a certain noise in the mixed gas introduced through the inlet passage 414, the heat inside the housing 41 The discharge to the outside of the housing 41 is prevented. The thermal insulation sound absorbing material 421 may be made of various materials, for example, may be formed of mineral wool having excellent thermal insulation and excellent noise absorption efficiency.

The support part 422 is formed inside the housing 41 outside the heat insulating sound absorbing material 421 to support the heat insulating sound absorbing material 421, and has one side surface of the support part 422 and the housing 41. The insulating sound absorbing material 421 is located between the inner surface of the. A plurality of perforations 422a are formed in the support part 422 so that the mixed gas introduced into the reactor 41 contacts the thermal insulation sound absorbing material 421 through the perforations 422a, so that the noise caused by the exhaust gas is reduced. do.

The resonance unit 43 is installed inside the housing 41 to resonate the mixed gas introduced into the housing 41 so that sound wave energy is lost to reduce noise, and the first resonance unit ( 431 and the second resonance unit 432.

The first resonance portion 431 is formed on the front side of the inner surface of the housing 41 to expand the mixed gas introduced into the housing 41 through the inlet passage 414, that is to resonate so as to reduce the sound wave energy In order to remove a certain noise by having a variety of shapes to expand the exhaust gas introduced through the inflow path 41, but preferably one end is coupled to the front surface 411 and the other end support portion 422 Coupled to the has a shape that is enlarged toward the discharge path (415) toward.

The second resonance unit 432 is formed on the inner side rear side of the housing 41 to contract the exhaust gas before being discharged through the discharge path 415, that is, to resonate so that the sound wave energy is reduced to improve a certain noise. In this configuration, the denitrification treatment is performed by the catalyst unit 44 to be described later, and may have various shapes such that the exhaust gas before being discharged through the discharge path 415 may be contracted. The other end is coupled to the support portion 422 has a shape that is enlarged toward the inflow path 414 toward. First and second resonators are formed at the front and rear ends of the housing to reduce noise by resonating the inflow exhaust gas, so that a process of expanding or reducing the front and rear ends of the housing is not necessary to reduce noise. There is a characteristic that can be reduced.

The catalyst unit 44 is installed in the housing 41 behind the first resonance unit 431 and includes a plurality of through holes 441 through which the catalyst is coated and the mixed gas can pass. The catalyst unit 44 is preferably coupled to the outer side of the thermal insulation and sound absorbing portion 42 and the perforation 4221 is provided near the support portion 422 of the thermal insulation and sound absorption portion 42 which is coupled to the catalyst portion 44. It is not formed so that the mixed gas can move toward the catalyst 44. The mixed gas introduced into the reactor 41 passes through the catalyst unit 44. In this process, nitrogen oxide (NOx) included in the mixed gas is converted into nitrogen through denitrification with the catalyst. In other words, the nitrogen oxide in the mixed gas is introduced into a harmless component through the reaction of the following chemical reaction by the action of the catalyst. However, urea water was used as a reducing agent in the reaction.

4NO + 4NH ₃ + O ₂ ? 4N ₂ + 6H ₂ O

_{2NO 2 + 4NH 3 + O 2} → 3N 2 + 6H 2 O

At this time, a variety of products can be used as the catalyst, such as oxides, such as V, Rh, Mo, W, Cu, Ni, Fe, Cr, Mn, Sn, sulfate, rare earth oxides, precious metals, etc. as catalytic active species, Products using catalyst carriers such as Al ₂ 0 ₃ , Ti0 ₂ , activated carbon, zeolite, silica, and the like may be used. Among them, V ₂ 0 ₅ (vanadium pentoxide) based on Ti0 ₂ (titanium oxide) is currently in practical use. , Mo0 ₃ (molybdenum troxide) and W0 ₃ (tungsten trioxide) catalysts.

The silencer 45 is located inside the reactor 4 at the rear of the catalyst unit 44 and passes through the catalyst unit 44 to reduce noise from the denitrified exhaust gas. It includes.

A plurality of partitions 451 are located in the reactor 6 at the rear side of the catalyst unit 44 in parallel with the flow direction of the exhaust gas at regular intervals, and pass through the catalyst unit 44 to perform denitrification treatment. It distributes the flow of exhaust gas and absorbs the noise. The partition 451 includes a sound absorbing material 4511 that absorbs noise, and a support plate 4512 positioned at both sides of the sound absorbing material 4511 to support the sound absorbing material 4511. The front surface 4413 of the partition 451 may have a semi-circular or triangular shape to minimize pressure loss of the denitrified exhaust gas flowing into the silencer 45.

The sound absorbing material 4511 is made of a sound absorbing material and absorbs noise from the denitrified exhaust gas passing through the silencer 45. The sound absorbing material may be made of various materials, for example, resistant to heat and excellent in absorbing noise. It may be formed of mineral wool.

The support plate 4512 is disposed on both sides of the sound absorbing material 4511 to support the sound absorbing material 4511, and the support plate 4512 includes a plurality of through holes 4512a to effectively absorb noise in the sound absorbing material 4511. ) Is formed.

The partition 451 prevents the formation of vortices and concentration of fluid to prevent the increase of sound wave energy by dispersing the flow of the denitrified exhaust gas, and the sound absorbing material 4511 absorbs noise, The silencer 45 can effectively reduce noise.

Looking at the process of denitrification reaction and noise reduction occurring in the exhaust gas denitrification reactor 4 having the above configuration, the mixed gas introduced into the housing 41 through the inlet 414 is the first resonance Noise is reduced by the expansion of the portion 431, the mixed gas passing through the first resonance portion 431 is denitrified while passing through the catalyst portion 44, and the exhaust gas denitrified by the catalyst portion 44. The gas passes through the silencer 45 to reduce noise, and the denitrified exhaust gas passing through the silencer 45 is expanded by the second resonance unit 432 to reduce the noise, thereby reducing the noise. Through 415). While the mixed gas is introduced into the housing 41 and discharged, the mixed gas or the denitrified exhaust gas may be reduced in noise by the thermal insulation sound absorbing unit 42. Exhaust gas denitrification reactor having the above configuration has a feature that can reduce the size of the reactor because the thermal insulation and the sound absorbing portion is formed inside the reactor to keep the reactor and absorb the noise, and the configuration and noise for the thermal insulation inside the reactor is reduced Since the configuration for the location is easy to install, there is a feature that can provide improved convenience in use.

12 to 14, a reactor 4 'used in an exhaust gas denitrification system according to another embodiment of the present invention will be described with reference to FIGS. 1 and 7 to 10. There is a difference between 4) and the resonance portion 43 ', and the resonance portion 43' will be described below.

The resonance unit 43 ′ is installed inside the housing 41 to resonate a mixed gas introduced into the housing 41 to reduce sound wave energy, thereby reducing noise. 431 'and a second resonance portion 432'.

The first resonance part 431 ′ is formed at the front side of the inner surface of the housing 41 to expand the mixed gas introduced into the housing 41 through the inflow path 414, that is, to resonate, thereby reducing sound wave energy. The expansion plate 4311 and the sound absorbing material 4312 are included in the configuration to remove the constant noise.

One end of the expansion plate 4311 is coupled to the front surface 411 and the other end is coupled to the support part 422, and is formed along the inner surface of the housing 41 to discharge the space of the housing 41 from the discharge path 415. A plurality of perforations 4311a are formed in the enlarged diameter plate 4311 in a configuration of increasing diameter toward the direction of.

The sound absorbing material 4312 is located in a space S1 formed by being surrounded by the front surface 411, the support part 422, and the expansion plate 4311 to absorb noise from the mixed gas.

The second resonance portion 432 ′ is formed at the rear side of the inner surface of the housing 41 to contract the exhaust gas before being discharged through the discharge path 415, that is, to resonate so that sound wave energy is reduced to reduce noise. In the structure to be improved, the shaft plate 4321 and the sound absorbing material 4322 are included.

The side mirror plate 4321 is coupled to one end of the rear surface 412, the other end is coupled to the support portion 422, and is formed along the inner surface of the housing 41, to discharge the space of the housing 41 to the discharge path (415) The shaft diameter plate 4321 has a plurality of perforations (4321a) is formed in the configuration to reduce the direction toward the () direction.

The sound absorbing material 4322 is located in a space S2 surrounded by the rear surface 412, the support part 422, and the shaft plate 4321 to absorb noise from the mixed gas.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Should be interpreted as falling within the scope of.

1: inlet part 2: reducing agent supply part 3: mixing chamber 4: reactor
5: outlet part 6: display 7: reductant supply control device
11: first analyzer 31: injection nozzle 41: housing 42: thermal insulation
43 resonance portion 44 catalyst 45 silencer 51 second analyzer
71: transceiver unit 72: function setting unit 73: storage unit 74: function execution unit
75: error correction 76: screen display 77: control unit 411: front
412: rear 413: side 414: inlet 415: outlet
421: Sound absorbing and insulating material 422: Supporting part 431: First resonance part 432: Second resonance part
451: compartment 711: first receiving module 712: second receiving module
713: transmission module 721: engine setting module 722: analyzer registration module
723: function selection module 731: first storage module 732: second storage module
741: first execution module 742: second execution module 743: third execution module
744: fourth execution module 751: error determination module 752: error correction module
761: display module 762: interface module 4511: sound absorbing material
4512: support plate 4512a: through hole 4513: front side 7411: reducing agent calculation module
7412: first reduction correction module 7413: second reduction correction module 7421: reducing agent calculation module
7422: Reductant Compensation Module

Claims (10)

In the reducing agent supply control device for controlling the amount of the reducing agent supplied to the exhaust gas,
The reducing agent supply control device includes a function execution unit including a plurality of execution modules for calculating the amount of reducing agent to be supplied to the exhaust gas according to the installation position and the number of analyzers for measuring and outputting information on the nitrogen oxides of the exhaust gas. Therefore, it is possible to supply a reducing agent by selecting a suitable execution module according to the installation position and the number of the analyzer can improve the convenience of use,
The function execution unit,
Supply to the exhaust gas according to the information transmitted by the first analyzer for measuring and outputting information on the nitrogen oxides of the exhaust gas before denitrification and the second analyzer for measuring and outputting information on the nitrogen oxides of the denitrification exhaust gas. The amount of the reducing agent to be supplied to the exhaust gas is provided only by the first execution module which calculates the amount of reducing agent to be carried out, and the information transmitted by the first analyzer which measures and outputs the information on the nitrogen oxides of the exhaust gas before the denitrification treatment. Reducing agent supply control device for exhaust gas denitrification comprising a second execution module for calculating. In the reducing agent supply control device for controlling the amount of the reducing agent supplied to the exhaust gas,
The reducing agent supply control device includes a function execution unit including a plurality of execution modules for calculating the amount of reducing agent to be supplied to the exhaust gas according to the installation position and the number of analyzers for measuring and outputting information on the nitrogen oxides of the exhaust gas. Therefore, it is possible to supply a reducing agent by selecting a suitable execution module according to the installation position and the number of the analyzer can improve the convenience of use,
The function execution unit,
Supply to the exhaust gas according to the information transmitted by the first analyzer for measuring and outputting information on the nitrogen oxides of the exhaust gas before denitrification and the second analyzer for measuring and outputting information on the nitrogen oxides of the denitrification exhaust gas. The first execution module for calculating the amount of reducing agent to be carried out, and the amount of reducing agent to be supplied to the exhaust gas with only the information transmitted by the second analyzer which measures and outputs the information about the nitrogen oxides of the denitrified exhaust gas. Reducing agent supply control device for exhaust gas denitrification comprising a third execution module. In the reducing agent supply control device for controlling the amount of the reducing agent supplied to the exhaust gas,
The reducing agent supply control device includes a function execution unit including a plurality of execution modules for calculating the amount of reducing agent to be supplied to the exhaust gas according to the installation position and the number of analyzers for measuring and outputting information on the nitrogen oxides of the exhaust gas. Therefore, it is possible to supply a reducing agent by selecting a suitable execution module according to the installation position and the number of the analyzer can improve the convenience of use,
The function execution unit,
Supply to the exhaust gas according to the information transmitted by the first analyzer for measuring and outputting information on the nitrogen oxides of the exhaust gas before denitrification and the second analyzer for measuring and outputting information on the nitrogen oxides of the denitrification exhaust gas. And a fourth execution module for calculating the amount of reducing agent to be supplied according to data on the amount of the reducing agent stored in the storage unit when the exhaust gas is introduced, and a fourth execution module for calculating the amount of reducing agent to be performed. Reducing agent supply control device for exhaust gas denitrification. According to any one of claims 1 to 3, wherein the reducing agent supply control device
When the selected execution module does not operate because an error occurs in all or part of the analyzer, the exhaust gas denitrification, characterized in that it further comprises an error correction to operate the other execution module of the function execution unit in accordance with the state of the analyzer. Reductant supply control device. The method of claim 1, wherein the function execution unit
A third execution module for estimating the amount of reducing agent to be supplied to the exhaust gas using only information transmitted by a second analyzer that measures and outputs information on the nitrogen oxides of the denitrified exhaust gas; And a fourth execution module for calculating an amount of the reducing agent to be supplied according to the data of the amount of the reducing agent stored. According to any one of claims 1 to 3, wherein the first execution module
Reducing agent calculation module for calculating the amount of reducing agent to be supplied according to the information on the nitrogen oxides of the exhaust gas sent from the first analyzer, and considering the ratio of nitrogen monoxide and nitrogen dioxide of the exhaust gas sent from the first analyzer The first reducing agent correction module for correcting the amount of reducing agent calculated by the reducing agent calculation module, and the reducing agent calculated by the first reducing agent correction module when the amount of nitrogen oxides in the exhaust gas sent from the second analyzer exceeds the allowable discharge value. Reducing agent supply control device for exhaust gas denitrification comprising a second reducing agent correction module for correcting the amount. The method of claim 3, wherein the storage unit
And a second storage module, in which data on the amount of the reducing agent to be supplied is tabled and stored according to the information of the engine for discharging the exhaust gas. The method of claim 4, wherein the error correction is
An error determination module that calculates an error of the analyzer by analyzing the information transmitted from the analyzer, and operation of another execution module instead of an execution module selected according to the state of the analyzer when the error determination module determines that the analyzer has an error Reducing agent supply control device for exhaust gas denitrification, characterized in that it comprises an error correction module for controlling the. The method of claim 8, wherein the error correction module
If the error determination module determines that the second analyzer has an error while information on nitrogen oxides of the exhaust gas is being transmitted by the first analyzer and the second analyzer, the operation of the first execution module is stopped and the first analyzer is stopped. Operating the second execution module and stopping the operation of the first execution module and operating the third execution module when the error determination module determines that the first analyzer has an error; Reducing agent supply control apparatus for exhaust gas denitrification, characterized in that for stopping the operation of the first execution module and operating the fourth execution module when it is determined that there is an error in both analyzers. Reductant supply unit for supplying a reducing agent to the incoming exhaust gas, a reactor for converting nitrogen oxides into nitrogen gas in the exhaust gas mixed with the reducing agent supplied from the reducing agent supply unit, reducing agent supply control device for controlling the reducing agent supply amount of the reducing agent supply unit Including;
The reducing agent supply control device is an exhaust gas denitrification system using the reducing agent supply control device for exhaust gas denitrification, characterized in that the reducing agent supply control device according to any one of claims 1 to 3.

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